REGENXBIO INC.

The present invention relates to nucleic acid expression cassettes that are engineered to enhance gene expression. Vectors and methods employing the expression cassettes containing novel chimeric regulatory elements are provided. The invention is particularly useful for delivery of transgenes to target cells and confers desirable properties for muscle¬gene therapy. Moreover, the invention relates to gene therapy methods of delivery of therapeutics for treating various disorders.

Provided herein are improved methods for producing recombinant Adeno-Associated Virus (rAAV) particles. In some embodiments, a method for producing recombinant AAV (rAAV) particles provided herein comprises culturing cells capable of producing rAAV particles in the presence of a histone deacetylase (HDAC) inhibitor. In some embodiments, a method for producing recombinant AAV (rAAV) particles provided herein comprises culturing cells capable of producing rAAV particles in the presence of a histone deacetylase (HDAC) inhibitor and increased amount of a sodium salt.

The present invention relates to recombinant adeno-associated viruses (rAAVs) having capsid proteins engineered to include amino acid sequences that confer and/or enhance desired properties. In particular, the invention provides engineered capsid proteins comprising peptide insertions from heterologous proteins inserted within or near variable region IV (VR-IV) of the virus capsid, such that the insertion is surface exposed on the AAV particle. The invention also provides capsid proteins that direct rAAVs to target tissues, in particular, capsid proteins comprising peptides that are inserted into surface-exposed variable regions using a method for replacing a stop codon in the capsid gene with such peptide insert. The invention provides such methods for making the rAAV vectors into vector libraries and selecting the rAAV vectors having peptide inserts that target the rAAV to particular tissues of interest, and thus deliver therapeutics for treating disorders.

A liquid suspension product comprising a recombinant adeno-associated virus (rAAV) having an AAV8 capsid which is suitable for intra-retinal injection is provided herein. Also provided herein are liquid suspensions containing these rAAV8.aVEGF and methods of using same for treatment of wet AMD and other ocular conditions.

Provided herein are scalable methods for the clarification of a composition comprising recombinant Adeno-Associated Virus (rAAV) particles and an impurity.

Provided herein are methods of treating neovascular age-related macular degeneration (nAMD) and diabetic retinopathy (DR) in a subject in need thereof comprising administering an anti-hVEGF treatment and a steroid treatment; wherein the anti-hVEGF treatment comprises administering a therapeutically effective amount of a recombinant viral vector comprising a nucleotide sequence encoding an anti-hVEGF antigen-binding fragment to an eye of the subject; and the steroid treatment comprises administering a therapeutically effective amount of a steroid to the eye of the subject.

Compositions and methods are described for the delivery of a fully human post-translationally modified therapeutic monoclonal antibody, or an antigen binding fragment thereof, that binds to C3 or C5 to a human subject for treatment of an ocular indication, particularly AMD. Also provided are compositions and methods for the delivery hCHL1 to a human subject for treatment of an ocular indication, particularly AMD. The nucleotide sequence encoding the antibody is delivered in a rAAV vector that targets ocular tissue cells for expression of the transgene.

Provided herein are pharmaceutical compositions for administration to a suprachoroidal space of an eye of a subject. The pharmaceutical compositions can include a recombinant adeno-associated virus (AAV) encoding a transgene. Also provided herein are methods for treating or preventing a disease in a subject by administering a therapeutically effective amount of the pharmaceutical compositions to the subject in need.

Provided is an invention based, in part, on novel gene constructs that encode a microdystrophin protein for use in gene therapy. The microdystrophin gene constructs and expression cassettes were engineered for improved therapy with respect to efficacy, potency and safety to the subject when expressed by a viral vector in muscle cells and/or CNS cells.

Provided is an invention based, in part, on novel gene constructs that encode a microdystrophin protein for use in gene therapy. The microdystrophin gene constructs and expression cassettes were engineered for improved therapy with respect to efficacy, potency and safety to the subject when expressed by a viral vector in muscle cells and/or CNS cells.